DESCRIPTIONS AND DETERMINATIONS OF SPECIES 45 



ranged in two pairs just behind the antennae, a third row of four larger 

 hairs just in front of the anterior margin of the thorax, and three small 

 hairs on each temporal margin. 



Antennae very close to the anterior margin of the head, the first 

 segment almost entirely concealed beneath the head, and not conspicu- 

 ously enlarged. Second segment slenderer, about as long as the first; 

 third, fouth and fifth segments subequal, shorter than the second. Ros- 

 trum near the anterior margin. 



Thorax wider than the head and longer than wide, rather hexagonal 

 in shape, the lateral margins sharply convex. A short spine at each shoul- 

 der and a median pair of hairs on the posterior margin of the prothorax. 

 Sternal plate spade-shaped, with a short handle-like projection anteriorly. 



First and second pairs of legs rather small and slender, with slender 

 claws. Third pair much larger and heavier, with very heavy claws, and 

 with a small tooth-like projection on the anterior margin of both the 

 femur and tarsus. 



Abdomen short, oval, widening rather abruptly behind the second 

 segment; which is only slightly wider than the thorax. No chitinized 

 tergal or sternal plates, the derm having a uniformly reticulated appear- 

 ance. The hairs on each segment are arranged in three groups, a median 

 group and a group near each lateral margin, the groups being distinctly 

 separated. The arrangement of the spines in the lateral groups as fol- 

 lows : first segment, none ; second segment, one in each group ; third seg- 

 ment with two ; fourth, fifth and sixth segments with three ; eighth with 

 one. Hairs in the median groups as follows : first, second and third seg- 

 ments with four ; fourth, fifth and sixth with six ; eighth with four ; 

 ninth with two. Seventh segment with the groups merging and forming 

 an unbroken row of eight spines, and with two long hairs at each angle. 

 Eighth likewise with two long hairs at each angle. Pleurites present on 

 the second to fifth segments, small and with a short, rounded tooth at 

 each posterior angle, and two or tree short spines on the posterior margin. 



On the ventral side the first segment apparently lacking ; second with 

 one row of three or four spines ; third with two rows, consisting of a 

 median group of six and two lateral groups of two each. Fourth to 

 sixth segments as on the dorsum. Seventh with four spines in the median 

 group and one in each lateral group. Genital plate very large. Gona- 

 pods with several short hairs, a large, stout spine, and several hairs at 

 each angle of the ninth segment. Third sternite with a pair of small chi- 

 tinous plates, the posterior end of each slightly notched, and with a short 

 spine in the notch. 



